No, it wouldn't. Although you could use a very
fine dialysis membrane to allow water to flow in
and out of a bag containing surfactant,
surfactants only cause changes in properties (like
surface tension) when they are dispersed at the
interface-- the water tension inside the bag would
change, but since the surfactant is trapped
inside, the water outside the bag would behave
normally. Only if surfactant molecules were free
to mingle at the water/air interface would a
change in surface tension be seen.
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